/**
 * Copyright (c) 2021 OceanBase
 * OceanBase CE is licensed under Mulan PubL v2.
 * You can use this software according to the terms and conditions of the Mulan PubL v2.
 * You may obtain a copy of Mulan PubL v2 at:
 *          http://license.coscl.org.cn/MulanPubL-2.0
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PubL v2 for more details.
 */

#ifndef _OB_SQL_EXPR_SPLIT_PART_H_
#define _OB_SQL_EXPR_SPLIT_PART_H_
#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase
{
namespace sql
{
class ObExprSplitPart : public ObStringExprOperator
{
public:
  explicit ObExprSplitPart(common::ObIAllocator &alloc);

  virtual ~ObExprSplitPart();

  virtual int calc_result_typeN(ObExprResType &type,
                                 ObExprResType *types,
                                 int64_t param_num,
                                 common::ObExprTypeCtx &type_ctx) const;


  virtual int cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
                      ObExpr &rt_expr) const override;

  static int calc_split_part_expr(const ObExpr &expr, ObEvalCtx &ctx,
                                        ObDatum &res);
  DECLARE_SET_LOCAL_SESSION_VARS;
private:
  DISALLOW_COPY_AND_ASSIGN(ObExprSplitPart);
};
}
}

#endif /* _OB_SQL_EXPR_SPLIT_PART_H_ */